Put eggs into water. Fresh ones will sink to the bottom, while the blunt ends of stale eggs will float on the water. This is because the longer the eggs are stored, the air chambers located at the blunt ends will As it becomes larger, its buoyancy also becomes relatively larger.

How to preserve eggs

Place the eggs in the egg trough of the refrigerator with the blunt end facing up, so that the yolk floats and sticks to the bottom of the air chamber to prevent microorganisms from invading. Extend the storage time, but it is still recommended to use it within 3 to 7 days.

Can you tell the doneness by rotating the eggs?

The more cooked the eggs, the higher the solid specific gravity and the higher the stability. Without breaking the egg, place the egg on the table and rotate it. If the egg rotates quickly and follows the same moving line, the doneness will be higher. If the egg rotates slowly and runs around, the doneness will be lower.

Easy way to control the doneness of boiled eggs

Boil eggs for 1 to 3 minutes: the egg whites are not fully cooked and become slightly translucent liquid, and the yolks are completely raw.

Boil the eggs for 5 minutes: the egg white has become opaque, but the texture is soft, and the yolk is still liquid. It will flow out when cut, and it tastes like a candy-centered egg.

Boil the eggs for 7 to 8 minutes: the egg whites are fully cooked. When they are medium-cooked, the egg whites will be as strong as hard-boiled eggs. The edges of the yolks will begin to harden, and there will still be some liquid in the middle.

Boil the eggs for 10 minutes: the whites and yolks are fully cooked. If you continue to cook it, the egg yolk will become harder and taste pinker. It is suitable to add mayonnaise to make egg salad so that the taste will not be so dry.

Put water in a pot, heat over low heat, pour lemon juice or white vinegar, salt, and add eggs directly to cook. Boil for about 5 minutes. The yolk will be raw and similar to a candied egg. Boil for about 8 minutes. The yolk will still be slightly liquid, like a salted duck egg. Boil for about 10 minutes and it will be fully cooked. Duck eggs are cooked in the same way.